数据库连接池druid报错，系统连接不上oralce，oralce无法登录
遇到的现象和发生背景
Could not open JDBC Connection for transaction: nested exception is comalibabadruid.pool.GetConnectionTimeoutException: wait millis 6010, active5, maxActive 500, creating 1, createElapseMillis 48654,createErrorCount 26
oracle日志文件没有alert
